Matthew Swarr, University of Montana, Geosciences, Missoula, MT, United States, Donald F Argus, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, Hilary R Martens, Department of Geosciences, University of Montana, Missoula, United States, Zachary Harwood Hoylman, University of Montana, Franke School of Forestry and Conservation, Missoula, United States, Zachary Young, Nevada Geodetic Lab, Nevada Bureau of Mines and Geology, University of Nevada, Reno, Reno, United States, Adrian A Borsa, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States, Nicholas Lau, University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States and William P Gardner, University of Montana, Missoula, MT, United States